AN ATLAS FOR STRUCTURAL STUDIES OF SPIRAL GALAXIES
Rotation Curves and Surface Brightness Profiles of 304 Bright Spirals
This data base contains information about structural properties of 304
late-type (Sb-Sc) spiral galaxies drawn from the UGC catalogue. The user
can access a large table of galaxy parameters compiled from the kinematic
and photometric data of Courteau (1996, 1997 [link]). This table can be
downloaded in one complete file, or searched for any range of parameters
using our search engine. The data files for each rotation curve and
luminosity profile (including multiple observations) are available. These
data were originally obtained for cosmic flow studies (e.g. Courteau etal
1993, Courteau 1993), and have been integrated in the Mark III Catalog of
Galaxy Peculiar Velocities (Willick etal 1995, 1996, 1997). The high
spatial and spectral resolution of these data make them ideal for structural
and dynamical investigations of spiral galaxies (e.g. Broeils & Courteau 1997;
Mo, Mao, & White 1998; Somerville & Primack 1999 (astro-ph/9802268);
Courteau & Rix 1999 (astro-ph/9707290).)
The galaxy parameters are compiled in a 66 column table (410 characters
wide) that can be down-loaded as a computer-readable ASCII file called
courteau99.dat. Column identification is given below, or you can also
print the file courteau99.readme. The data table combines information
published in Tables 4 and 3 of Courteau (1996) and Courteau (1997),
respectively. Please take the time to familiarize yourself with these
papers before using these data. The selection criteria of this sample
sample are described in Courteau (1996).
The entire library of individual luminosity profiles and rotation curves
can be retrieved as two single tar files (data_rotation.tar and
data_photometry.tar), or on a galaxy-by-galaxy basis (using the Preview
system, P, within the catalogue search page).
These data are made available to the community for public use. Use of
this data base should refer to "The data base of spiral galaxies by
Courteau (1996, 1997)." The reference for each paper is:
Courteau, S. 1996, ApJS, 103, 363 - photometry paper
Courteau, S. 1997, AJ, 114, 2402 - rotation curve paper
For more questions or comments about this data base, please
contact stephane.courteau@hia.nrc.ca. We would also appreciate
new references of papers using these data.
The data base Web architecture was designed by Daniel Durand of the CADC.
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Other references:
Streaming Motions
Courteau, S. Faber, S.M., Dressler, A. & Willick, J.A. 1993, ApJL, 412, 51
Courteau 1993, in Cosmic Velocity Fields, eds. Bouchet & Lachieze-Rey
(Editions Frontieres, France), 537
Mark III Catalog of Galaxy Peculiar Velocities
Dekel \etal astro-ph/9812197
Willick, J.A., Courteau, S., Faber, S.M., Burstein, D., Dekel, A.,
& Strauss, M.A. 1997, ApJS, 109, 333
Willick, J.A., Courteau, S., Faber, S.M., Burstein, D., Dekel, A.,
& Kolatt, T. 1996, ApJ, 457, 460
Willick, J.A., Courteau, S., Faber, S.M., Burstein, D., & Dekel, A.
1995, ApJ, 446, 12
Burstein, Willick, \& Courteau 1995, "Inclination-Dependence
of Spiral Galaxy Physical Properties: History and Tests,"
in The Opacity in Spiral Disks, eds. Davies \& Burstein
(Nato Series; Kluwer, Dordrecht), 73
(These are the main publications that describe the MarkIII Catalog of
Galaxy Peculiar Velocities. Many other investigations have made
use of the Mark III data base but are not listed here).
Secular Evolution and Bulde/Disk Decompositions
Courteau, S., de Jong, R.S., & Broeils, A.H. 1996, ApJL, 457, 73
Courteau, S. 1996, in Morphology and Dust Content in Spiral Galaxies,
ed. Block & Greenberg (Kluwer:Dordrecht), 255
Mass Modelling and Maximal Disks
Courteau, S. & Rix, H-W. 1999, ApJ, 513, xxx
Broeils, A. & Courteau, S. 1997, in Dark and Visible Matter in Galaxies
and Cosmological Implications, ed. Persic \& Salucci,
(San Francisco: ASP), Vol. 117, 74
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TABLE OF PHOTOMETRIC AND SPECTROSCOPIC PARAMETERS for 304 CF GALAXIES.
All quantities are fully corrected unless mentioned otherwise. All
rotational velocities correspond to twice the full rotation amplitude.
Ref.: C96: Courteau, S. 1996, ApJS, 103, 363 - photometry paper
C97: Courteau, S. 1997, AJ, 114, 2402 - rotation curve paper
1 - The galaxy UGC number. The last two entries refer to CGCG reference
numbers;
2 - nrc, the total number of rotation curves per galaxy;
3 - nsb, the total number of surface brightness profiles per galaxy;
4 - eps, the ellipticity of the best-fitting isophote on the disk-dominated
part of the galaxy profile (see C96);
5 - incl, inclination computed with an intrinsic flattening, q0 = 0.18;
6 - vhel, the heliocentric redshift in km/sec. Defined as the center of
symmetry of the rotation curve as measured with Model 2 (cf C97);
7 - vlg, the radial velocity corrected for motion with respect to the Local
Group; vlg = vhel - 79 cos(l)cos(b) + 296 sin(l)cos(b) - 36 sin(b)
(Courteau & van den Bergh 1999)
8 - vcmb, the radial velocity in the frame of the Cosmic Microwave
Background. The correction uses the motion of the Sun with respect
to the CMB frame determined by the COBE dipole anisotropy
(Kogut \etal 1993);
9 - dv15q, the velocity width measured from the flux-weighted rotation
profile at 15\% of the total area;
10 - eta15 = log(dv15q) - 2.5;
11 - dv20q, same as $W_{15}$ but measured at 20\% of the total area;
12 - eta20 = log(dv20q) - 2.5;
13 - vmax, maximum velocity of RC model 2 (as in C97);
14 - evmax = log(vmax) - 2.5;
15 - vdisk (equivalent to v2.2), velocity measured from Model 2 at 2.15 disk
scalelengths (peak velocity for pure disk);
16 - evdisk = log(vdisk) - 2.5;
17 - viso, "Isophotal" velocity measured from Model 2 at the isophotal
level of 23 mag/arcsec^-2;
18 - eviso = log(eviso) - 2.5;
19 - vopt, the velocity from Model 2 measured at r_opt = 3.2h (optical radius
as defined by Persic & Salucci);
20 - evopt = log(vopt) - 2.5;
21 - Whist, the velocity difference between the 10th and 90th
(interpolated) percentile points in the ranked distribution
of velocities;
22 - ewhist = log(Whist) - 2.5;
23 - ls_m, the mean logslope dlogv/dlogr from Model 2 using bootstrap least-
square fits between r_disk (=2.15h) and the last fitted velocity point;
24 - ls_r, the logslope measured from the observed RC between r_disk and the
last measured velocity point;
25 - ls24, the logslope measured from the observed RC between r_disk and 4
exponential disk scale lengths;
26 - n_24, the number of points used to bootstrap ls_24;
27 - sd24, the 1 sigma deviation for the 100 random realizations in ls_24
28 - r23kpc, the corrected radius at the 23 r mag arcsec^{-2} isophote in
kpc. Isophotal radii are corrected for both Galactic extinction
effects and cosmological stretch (as in C96). The transformation to
kpc assumes a distance from the vlg redshift and a Hubble constant of
70 km/sec/Mpc;
29 - r24kpc. Analogous to r23kpc;
30 - r25kpc. Analogous to r23kpc and r24kpc;
31 - rmaxkpc, the maximum radius in kpc from the last measured detection on
either side of the RC;
32 - rmax, same as rmaxkpc but expressed in arcsec;
33 - h["], the corrected scalelength in arcsec. Values from
Broeils & Courteau (1997; 1D B/D) were adopted when available.
All scalelengths are corrected for cosmological stretch.
Galactic extinction is irrelevant;
34 - hkpc, the corrected disk scalelength in kpc;
35 - rmax/ropt, the maximum RC radius divided by the optical radius measured
at 3.2 disk scalelength;
36 - rmax/h, the maximum RC radius divided by the disk scalelength;
37 - rp/h, radius where the rotation curve peaks (often last point of RC)
divided by the disk scalelength;
38 - rmag23, the corrected apparent magnitude at the 23 mag arcsec^{-2}
level. Isophotal and total magnitudes are corrected for Galactic
reddening (abcor) and internal extinction (extcor) (see C96);
39 - rmag24, the corrected apparent magnitude at the 24 mag arcsec^{-2}
level;
40 - rmag25, the corrected apparent magnitude at the 25 mag arcsec^{-2}
level;
41 - abcorr, correction for r-band Galactic extinction (C96);
42 - extcorr, correction for r-band internal extinction (C96);
43 - rmag (m_r^c), the corrected r-band total extrapolated apparent
magnitude;
44 - rm2_2, corrected apparent magnitude measured inside r_disk;
45 - absm23, absolute magnitude of fully corrected rmag23.
Absolute magnitudes are computed using LG redshifts and H0=70;
46 - absm25, absolute magnitude of fully corrected rmag25;
47 - absm2_2, absolute magnitude of fully corrected rm2_2;
48 - absmr, absolute magnitude of fully corrected rmag.
absmr = rmag - 5log D[Mpc] + 25;
49 - absBRC3, absolute magnitude of B-band magnitude from fully corrected
RC3 raw magnitudes. The correction for Galactic extinction follows
a Burstein-Heiles prescription with $A_B = 1.45$ and our internal
correction uses B_Tcorr = B_T - 1.45*loga/b - loga/b_70.
50 - B-r color term (Columns 49-48). The mean value is
B-r = 0.74 +/- 0.23;
51 - L_B, absolute B-band luminosity in solar units /1E10.
Assumes $M_B\odot$ = 5.41;
52 - L_B*, absolute B-band luminosity divided by Schecter's L* in the B-band.
I use M*B = -19.5 + 5.*alog10(H0/100), from the Stromlo-APM survey.
For H0=70, M*B=-20.27 and L*=1.88E+10 in solar units;
53 - D/T, the ratio if fitted disk light to total measured light for the
whole galaxy;
54 - D/M2_2, the ratio if fitted disk light to measured light inside r_disk;
55 - CSB, central surface brightness from disk fits;
56 - DIST, the distance of the galaxy in Mpc, computed as D = vlg/H0
(Inferred TF distances are discarded since peculiar motions are more
uncertain than distance errors);
57 - FACT, conversion factor to change arcseconds into kpc;
58 - Gamma, the exponent term in Model 2 (see function summary below);
59 - Rt/Ropt, the turnaround radius in Model 2 divided by the optical radius;
60 - F, the Freeman Type (I or II);
61 - QHF, 0/1 if the galaxy is away from or included in the Quiet Hubble flow;
62 - Same as Column 1;
63 - Hubble type of the galaxy.
c The rotation curve parameterization (Model 2) has the form:
c
c vr = v_0 + v_c * 1+x^b / 1 + x^g^1/g, where
c
c x = r_t/r-r_0
c
c where: a1 = v_0 velocity center
c a2 = r_0 position center
c a3 = v_c asymptotic velocity (positive if curve has + slope
c negative if curve has - slope)
c a4 = r_t turnover radius between solid-body and flat part
c a5 = Gamma sharpness of turnover
c a6 = Beta flat curve drop-off index